qqwing: fix an infinite loop on unsigned char archs

Using the `--solve` option on powerpc made qqwing freeze. A looped
getchar(3) call never reached EOF, since the return value was stored
as a char, that is unsigned on powerpc and arm*, instead of int.

OK jca@

games/qqwing/Makefile

@@ -1,9 +1,9 @@
-# $OpenBSD: Makefile,v 1.3 2019/07/12 20:46:23 sthen Exp $
+# $OpenBSD: Makefile,v 1.4 2021/07/24 19:35:41 cwen Exp $
 
 COMMENT =	Sudoku generator and solver
 DISTNAME =	qqwing-1.3.4
 SHARED_LIBS +=  qqwing                    0.0 # 3.0
-REVISION =	0
+REVISION =	1
 
 CATEGORIES =	games
 

games/qqwing/patches/patch-main_cpp

@@ -0,0 +1,17 @@
+$OpenBSD: patch-main_cpp,v 1.1 2021/07/24 19:35:41 cwen Exp $
+
+Fix infinite loop while using `qqwing --solve` on unsigned char archs (powerpc
+and arm)
+
+Index: main.cpp
+--- main.cpp.orig
++++ main.cpp
+@@ -488,7 +488,7 @@ void printHelp(){
+ bool readPuzzleFromStdIn(int* puzzle){
+ 	int read = 0;
+ 	while (read < BOARD_SIZE){
+-		char c = getchar();
++		int c = getchar();
+ 		if (c == EOF) return false;
+ 		if (c >= '1' && c <='9'){
+ 			puzzle[read] = c-'0';